CN116291320A

CN116291320A - Emergent pressure release pipe-line system of drilling tool water eye

Info

Publication number: CN116291320A
Application number: CN202111564783.2A
Authority: CN
Inventors: 韩儒; 西佐伟; 王鹏翀; 关大鹏; 杨文冉; 徐源
Original assignee: Sinopec Oilfield Service Corp; Sinopec Zhongyuan Petroleum Engineering Co Ltd; Pipe Co of Sinopec Zhongyuan Petroleum Engineering Co Ltd
Current assignee: Sinopec Oilfield Service Corp; Sinopec Zhongyuan Petroleum Engineering Co Ltd; Pipe Co of Sinopec Zhongyuan Petroleum Engineering Co Ltd
Priority date: 2021-12-20
Filing date: 2021-12-20
Publication date: 2023-06-23

Abstract

The invention discloses a drilling tool water hole emergency pressure relief pipeline system, which comprises a system main body, wherein the system main body comprises: a drain manifold, an inlet of which is used for communicating with the drilling tool water hole; the inlet of the regulating valve group is communicated with the outlet of the drain manifold; the inlet of the liquid-gas separator is communicated with the outlet of the regulating valve group, the gas outlet of the liquid-gas separator is communicated with the exhaust pipeline, the liquid outlet of the liquid-gas separator is discharged to a preset treatment station through the slurry discharging pipe, and the gas outlet of the liquid-gas separator is conveyed to a gas ignition station through the exhaust pipeline; when the pressure is released, the opening of the regulating valve group enables the drainage flow entering the liquid-gas separator to be lower than the maximum limit value of the treatment flow of the liquid-gas separator. According to the invention, gas-liquid separation is realized through the liquid-gas separator, so that the respective discharge of liquid and gas is realized, the separated gas is ignited, and the occurrence of ignition, harmful gas leakage or environmental protection event on a drilling site is avoided.

Description

Emergent pressure release pipe-line system of drilling tool water eye

Technical Field

The invention relates to the technical field of petroleum drilling engineering, in particular to a drilling tool water hole emergency pressure relief pipeline system.

Background

The well-communicated drill rod, the weighting drill rod, the centralizer, the drill collar, the internal blowout prevention tool, the screw underground power drilling tool and the drill bit form an oil drilling tool, and the combination of the inner chambers of all the drilling tools is called as a drilling tool water hole.

The high compression ratio is a remarkable characteristic of gas, the natural gas has the characteristic of inflammability and explosiveness, the associated hydrogen sulfide and the like have high toxicity, and the importance of the well control work of the high-pressure gas well is determined, in particular the high risk during overflow and blowout. The overflow high-pressure gas invades the water hole of the drilling tool, and after the water hole of the drilling tool is blocked, the emergency pressure relief of the ground of the water hole of the drilling tool is a dangerous well control operation.

After the high-pressure gas invaded in the water hole of the drilling tool and the water hole of the drill bit is blocked, the drilling tool is detached from a certain position after the water hole pressure of the drilling tool needs to be removed urgently, and the water hole of the drilling tool and the annulus are communicated for circulating well killing operation. The common emergency pressure relief method for the water hole of the drilling tool comprises the following steps: and (4) introducing a drainage pipeline to the drilling tool at the drilling floor surface to drain to a mud tank, a sewage disposal pit or a special drainage pool for drainage. However, due to the difficult control of the discharge amount, the discharge mode into the mud tank causes pollution of drilling fluid and increases the drilling cost; the mixed liquid and gas guided to the sewage pit or the discharge pool are extremely easy to splash at a high speed and remotely to cause environmental pollution; the exhaust pipeline is easy to break and puncture due to gas pressure relief vibration, so that the environment is polluted, and the drilling safety is influenced. In recent years, the events of well site fire, pollution of drilling fluid and pollution of the drilling fluid to the ground and environment caused in the operation of water hole pressure relief of a plurality of drilling tools occur.

Therefore, how to avoid the occurrence of fire, harmful gas leakage or environmental protection event on the drilling site, and provide powerful guarantee for natural gas drilling is a technical problem to be solved urgently by those skilled in the art.

Disclosure of Invention

In view of the above, the invention aims to provide a drilling tool water hole emergency pressure relief pipeline system, which avoids the occurrence of fire, harmful gas leakage or environmental protection events on a drilling site and provides powerful guarantee for natural gas drilling.

In order to achieve the above object, the present invention provides the following solutions:

the system main body comprises a drain manifold, a regulating valve group and a liquid-gas separator;

the inlet of the drain manifold is used for being communicated with a drilling tool water hole, the inlet of the regulating valve group is communicated with the outlet of the drain manifold, and the opening of the regulating valve group is adjustable; the inlet of the liquid-gas separator is communicated with the outlet of the regulating valve group, the gas outlet of the liquid-gas separator is communicated with an exhaust pipeline, the liquid outlet of the liquid-gas separator is discharged to a preset treatment station through a slurry discharging pipe, and the gas outlet of the liquid-gas separator is conveyed to a gas ignition station through the exhaust pipeline;

and when the pressure is released, the opening of the regulating valve group enables the drainage flow entering the liquid-gas separator to be lower than the maximum limit value of the treatment flow of the liquid-gas separator.

In a specific embodiment, the system body further comprises a drilling fluid treatment system, the drilling fluid treatment system is arranged at a preset treatment station, and an inlet of the drilling fluid treatment device is communicated with a liquid outlet of the liquid-gas separator;

and/or

The system body further includes an ignition device disposed at the gas ignition station for igniting the gas exiting the outlet of the exhaust line.

In another specific embodiment, the drilling fluid treatment system comprises a vibrating screen, a mud remover, a sand remover and a deaerator, wherein the inlet of the vibrating screen is communicated with the liquid outlet of the liquid-gas separator through the slurry discharging pipe, the outlet of the vibrating screen is communicated with the inlet of the mud remover, the outlet of the mud remover is communicated with the inlet of the sand remover, and the outlet of the sand remover is communicated with the inlet of the deaerator;

and/or

The drain manifold is disposed against the drill floor and the derrick.

In another specific embodiment, the system body further comprises a pressure relief six-way and plug valve;

the drain manifold comprises a joint, a plunger valve, an elbow and a connecting pipe;

one end of the plug valve is communicated with the drilling tool water hole, and the other end of the plug valve is communicated with one end of the plunger valve through a joint;

the number of the elbows and the connecting pipes is at least 1, and the other end of the plunger valve is communicated with one end of the pressure relief six-way through the elbow and the connecting pipes;

and the other end of the pressure relief six-way valve is communicated with the regulating valve group.

In another specific embodiment, the pressure relief six-way valve comprises a six-way body, a first side interface and a bottom flange,

the six-way body is internally provided with a pore canal, the first side connector and the bottom flange are respectively communicated with two ends of the pore canal and are respectively used for communicating an outlet of the drain manifold and an inlet of the regulating valve group;

the elbow comprises an elbow body, wherein the elbow body is provided with a plurality of bent holes,

the elbow body is provided with a first communicating pipe and a second communicating pipe which are mutually and vertically connected, the first end of the first communicating pipe is used for feeding liquid, the first end of the second communicating pipe is used for discharging liquid,

the side wall of the first communicating pipe is provided with a communicating hole communicated with the second end of the second communicating pipe, the second end of the first communicating pipe is closed, and a concave anti-flushing liquid pad area is formed at the second end of the first communicating pipe.

In another specific embodiment, the pressure relief six-way valve further comprises a second side interface and a third side interface which are both arranged on the six-way valve body, and the second side interface and the third side interface are both communicated with the pore canal;

the second side interface and the third side interface are respectively detachably connected with a blind flange and are used for sealing the second side interface and the third side interface;

the flanges arranged at the first side interface, the second side interface and the third side interface are interchangeable;

the main body is also provided with a pressure sensor connecting hole communicated with the pore canal and used for installing a pressure sensor;

and/or

The main body is also provided with a pressure gauge hole communicated with the pore canal and used for installing a pressure gauge;

the inner wall of the first communication pipe is provided with a mark which is an arrow along the flowing direction of the liquid flow;

and/or

The elbow also comprises a male union head and a female union head, wherein one of the male union head and the female union head is installed at the first end of the first communicating pipe, and the other is installed at the first end of the second communicating pipe.

In another specific embodiment, the system body further comprises a slip;

the slips are fixed on the connecting pipe and the anti-falling safety rope.

In another embodiment, the slip includes a main slip body, a secondary slip body, a first locking member, and a second locking member;

the main slip body and the auxiliary slip body are respectively clamped at two sides of the connecting pipe and are fixed together through the first locking piece;

the main slip body is provided with a rope groove allowing the anti-falling safety rope, and the second locking piece locks the outlet of the rope groove so as to limit the anti-falling safety rope in the rope groove.

In another specific embodiment, the regulating valve group comprises a flat valve, a choke manifold, a choke valve and a blow-off line;

the inlet of the flat valve is communicated with the outlet of the drain manifold, the outlet of the flat valve is communicated with the inlet of the throttle valve through the throttle manifold, and the outlet of the throttle valve is communicated with the inlet of the liquid-gas separator through the blowout pipeline.

In another specific embodiment, the drilling tool water hole emergency pressure relief pipeline system further comprises a transport sled;

the transport sled is respectively provided with a fixed bracket for fixing each part of the system main body;

the transport sled is provided with a protective cover for protecting the system main body;

the transporting sled is provided with a rope lifting lug and/or a forklift supporting hole.

The various embodiments according to the invention may be combined as desired and the resulting embodiments after such combination are also within the scope of the invention and are part of specific embodiments of the invention.

Without being limited by any theory, it can be seen from the above disclosure that the drilling tool water hole emergency pressure relief pipeline system provided by the invention, when in use, communicates the inlet of the drain manifold with the drilling tool water hole; then, the micro-opening regulating valve group is subjected to low-flow pressure relief; then, the opening degree of the regulating valve group is regulated to ensure that the drainage flow entering the liquid-gas separator is lower than the maximum limit value of the treatment flow of the liquid-gas separator to carry out pressure relief operation, the liquid-gas separation is realized through the liquid-gas separator, the separate discharge of liquid and gas is further realized, the separated gas is ignited for treatment, the occurrence of ignition, harmful gas leakage or environmental protection event on a drilling site is avoided, and powerful guarantee is provided for natural gas drilling.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a drilling tool water hole emergency pressure relief pipeline system provided by the invention;

fig. 2 is a schematic flow structure diagram of a drilling tool water hole emergency pressure relief pipeline system provided by the invention;

FIG. 3 is a schematic cross-sectional view of an elbow provided by the present invention;

fig. 4 is a schematic front view of a structure of an elbow according to the present invention;

fig. 5 is a schematic structural diagram of a pressure relief six-way valve according to the present invention;

fig. 6 is a schematic cross-sectional view of a pressure relief six-way valve according to the present invention;

FIG. 7 is a schematic diagram of a front view of a slip according to the present invention;

fig. 8 is a schematic structural view of the transporting sled according to the present invention.

Wherein, in fig. 1-8:

plug valve 1, joint 2, plug valve 3, elbow 4, connecting pipe 5, pressure relief six-way 6, flat valve 7, choke manifold 8, choke valve 9, blow-off line 10, liquid-gas separator 11, exhaust line 12, ignition port 13, slurry discharge pipe 14, slips 15, main slip body 1501, auxiliary slip body 1502, second locking piece 1503, rope groove 1504, gasket 1505, elbow body 401, first communication pipe 402, second communication pipe 403, male union 404, female union 405, anti-flushing liquid pad area 406, mark 407, six-way body 601, pressure sensor connecting hole 602, pressure gauge hole 603, first side interface 604, second side interface 605, third side interface 606, orifice 607, bottom flange 608, transport skid 16, lifting lug 1602, forklift bracket 1601, fixing bracket 1603.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. This invention may be embodied in many different forms and is not limited to the implementations described in this example. The following detailed description is provided to facilitate a more thorough understanding of the present disclosure, in which terms indicating orientations of the device or the like are used only in connection with the location of the illustrated structure in the corresponding drawings.

It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Further, the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, elements, components, and/or groups thereof. The description of the preferred embodiments is provided for the purpose of illustrating the general principles of the invention and is not meant to limit the scope of the invention. The scope of the invention is defined by the appended claims.

As shown in fig. 1, the invention discloses a drilling tool water hole emergency pressure relief pipeline system, which avoids the occurrence of fire, harmful gas leakage or environmental protection event on a drilling site and provides powerful guarantee for natural gas drilling.

The drilling tool water hole emergency pressure relief pipeline system comprises a system main body, and specifically comprises a drain manifold, a regulating valve group and a liquid-gas separator 11.

The inlet of drain manifold is used for communicating with drilling tool water hole, the inlet of regulating valve group and the export intercommunication of drain manifold, and the aperture of regulating valve group is adjustable.

The inlet of the liquid-gas separator 11 is communicated with the outlet of the regulating valve group, the gas outlet of the liquid-gas separator 11 is communicated with the exhaust pipeline 12, and the liquid outlet of the liquid-gas separator 11 is discharged to a preset treatment station through the slurry discharge pipe 14 for slurry treatment. The gas outlet of the liquid-gas separator 11 is conveyed to a gas ignition station through an exhaust pipeline 12 for combustion treatment, so that the gas is prevented from being directly discharged into the atmosphere to pollute the environment. The liquid-gas separator 11 allows the gas at the gas outlet to be pure and free of liquid, and to be fully combusted.

When the pressure is released, the opening of the regulating valve group enables the drainage flow entering the liquid-gas separator 11 to be lower than the maximum limit value of the treatment flow of the liquid-gas separator 11, so that explosion is prevented.

When the drilling tool water hole emergency pressure relief pipeline system provided by the invention is used, the inlet of the drain manifold is communicated with the drilling tool water hole; then, the micro-opening regulating valve group is subjected to low-flow pressure relief; then, the opening degree of the regulating valve group is regulated to enable the drainage flow entering the liquid-gas separator 11 to be lower than the maximum limit value of the treatment flow of the liquid-gas separator 11 for pressure relief operation, the liquid-gas separation is realized through the liquid-gas separator 11, further, the separate discharge of liquid and gas is realized, the separated gas is ignited for treatment, the occurrence of ignition, harmful gas leakage or environmental protection event on a drilling site is avoided, and powerful guarantee is provided for natural gas drilling.

In some embodiments, the system main body further comprises a drilling fluid treatment system, the drilling fluid treatment system is arranged at a preset treatment station, an inlet of the drilling fluid treatment device is communicated with a liquid outlet of the liquid-gas separator 11, and the drilling fluid treatment system can be used in a recycling mode after being subjected to a purification process treatment.

Further, the invention specifically discloses a drilling fluid treatment system which comprises a vibrating screen, a mud remover, a sand remover and a deaerator.

The inlet of the vibrating screen is communicated with the liquid outlet of the liquid-gas separator 11 through a slurry discharging pipe 14, and is used for separating muddy water and impurities in the slurry to a certain extent.

The outlet of the vibrating screen is communicated with the inlet of the mud remover, namely, the muddy water separated by the vibrating screen enters the mud remover to separate mud from water.

The outlet of the desilting device is communicated with the inlet of the desilting device, namely, the water separated by the desilting device enters the desilting device for desilting treatment.

And the outlet of the sand remover is communicated with the inlet of the deaerator, namely, the water treated by the sand remover is subjected to deaeration treatment in the deaerator, and finally, the obtained water is used as drilling fluid to be recycled.

In some embodiments, the present disclosure further includes an ignition device disposed at the gas ignition station for igniting the gas exiting at the outlet of the exhaust line 12.

Specifically, the ignition device is a torch.

In some embodiments, the drain manifold is disposed against the drill floor and derrick with minimal travel, quick installation, and easy securement.

Further, the invention discloses a system main body, which also comprises a pressure relief six-way valve 6 and a plug valve 1, wherein a drain manifold comprises a joint 2, a plug valve 3, an elbow 4 and a connecting pipe 5.

One end of the plug valve 1 is communicated with a drilling tool water hole, and the other end of the plug valve 1 is communicated with one end of the plunger valve 3 through a joint 2.

The number of the elbows 4 and the connecting pipes 5 is at least 1, and the other end of the plunger valve 3 is communicated with one end of the pressure relief six-way 6 through the elbows and the connecting pipes 5.

The other end of the pressure relief six-way valve 6 is communicated with the regulating valve group.

Further, the invention discloses a joint 2 which is a composite joint, wherein one end of the composite joint is a male union, and the other end of the composite joint is a drill rod male joint and is used for connecting a drill rod. The compound joint is provided with a plurality of integrated joints, and one ends of all the joints 2 are public union and are used for connecting the plunger type unscrewed valve; the other end is a different drill rod male buckle joint processed according to the standard of GBT22512.2 (processing and measurement of screw shoulder threaded connection of the 2 nd part of the petroleum and natural gas industry rotary drilling equipment), and is provided with conventional drill tool buckles with model sizes of NC50, NC46, NC38 and 5-1/2' FH so as to be suitable for different drill tool configuration well sites.

Furthermore, the invention discloses that the composite joint is also provided with 1 union joint and union blank joints, and when the non-GBT 22512.2 standard drilling tool is used on a drilling site, the blank joints suitable for the union joint can be used after being processed according to the on-site drilling tool.

In some embodiments, the plunger valve 3 is a plunger-type turn-on valve, and both ends of the plunger-type turn-on valve are union.

Furthermore, the invention discloses a plunger type unscrewing valve which is a special valve for fracturing and cementing a ground manifold, and is used as an on-off valve in the emergency pressure relief operation of a drilling tool water hole, compared with a drilling tool plug valve configured by a drilling tool assembly in the prior art, the outside diameter, the inside diameter and the sealing mechanism are limited as the drilling tool plug valve enters a borehole and works under the rotation condition along with a drill string, the sealing areas of a valve core and a valve seat are limited, the use reliability is lower, and the plunger type unscrewing valve used by the invention is not limited by the outside diameter, the valve core and the valve seat are large in volume and large in sealing contact area, the sealing mechanism is reasonable in arrangement, and the sealing effect and the service life of the valve core and the valve seat are far higher than those of the drilling tool plug valve.

In some embodiments, the connecting pipe 5 is a high-pressure composite steel pipe with two ends being union and different lengths, and the invention is all preferably connected by adopting the high-pressure composite steel pipe meeting the standard on the ground of petroleum fracturing and well cementation operation, so that the on-site quick assembly and disassembly can be realized, and the defects of erosion intolerance, easy shaking and damage caused by pressure fluctuation and the like of the hose are avoided. Specifically, the invention is provided with six high-pressure composite steel pipes with different lengths of 0.25m, 0.5m, 1m, 2m, 3m and 4m, and the number of the high-pressure composite steel pipes is more than one. When different intervals and height differences are arranged between water holes of drilling tools at different well sites and the pressure relief six-way 6, the high-pressure composite steel pipe combination with different lengths can be changed to meet the requirements of adjusting the length and the folding position of a drainage pipeline, the design purposes of quickly and smoothly accessing the drilling tools and the pressure relief six-way 6 are achieved, and the method of adjusting the folding position by using the movable elbow with lower reliability in the past is abandoned.

In some embodiments, the elbow 4 is a right-angle composite elbow with union ends, and further, the elbow 4 is a target-type right-angle composite elbow.

Further, as shown in fig. 3 and fig. 4, the present invention specifically discloses that the elbow 4 includes an elbow body 401, a first communicating pipe 402 and a second communicating pipe 403, where the elbow body 401 is connected to each other vertically, and a first end of the first communicating pipe 402 is used for liquid intake, and a first end of the second communicating pipe 403 is used for liquid discharge.

The side wall of the first communication pipe 402 is provided with a communication hole communicated with the second end of the second communication pipe 403, the second end of the first communication pipe 402 is closed, and a concave anti-flushing pad area 406 is formed at the second end of the first communication pipe 402.

Specifically, the first communicating pipe 402 and the second communicating pipe 403 are vertically arranged, that is, the elbow body 401 is similar to the tee internal duct 607 with a straight end face blocked, when in use, some flowing medium is accumulated in the anti-flushing pad area 406, so that the anti-flushing performance of the elbow 4 can be greatly improved, and the use reliability of the pipeline is ensured.

Further, the inner wall of the first communication tube 402 is provided with a mark 407, which facilitates the connection of the inlet and outlet of the elbow 4 with other components.

In some embodiments, the mark 407 is an arrow along the direction of the liquid flow entering, specifically, the mark 407 is an arrow milled on the inner wall of the first communication pipe 402, and is coated with a yellow warning, which is different from the elbow 4, so as to avoid the connection error of the end face of the liquid inlet and the end face, and the elbow 4 loses the liquid pad erosion-resistant function, and the milling process and the yellow ensures that the mark 407 is striking and not easy to damage.

Note that the mark 407 is not limited to an arrow, and may be other marks such as a letter.

The union on elbow 4 includes a male union 404 and a female union 405, one of the male and

female unions

404 and 405 being mounted at a first end of first communication tube 402 and the other being mounted at a first end of second communication tube 403.

Furthermore, the invention discloses a union of the composite joint, the plunger type unscrewing valve, the high-pressure composite steel pipe and the composite elbow 4, which are integrally processed with the body or the pipe body, and no connecting screw thread is arranged between the union and the body or the pipe body, so that the union has high strength, vibration resistance and loose resistance.

In some embodiments, the present invention discloses that the system body further comprises a slip 15, the slip 15 being fixed to the connection pipe 5, the slip 15 being fixed to the anti-slip safety line.

Further, as shown in fig. 7, the present invention discloses that the slip 15 includes a main slip body 1501, a secondary slip body 1502, a first locking member and a second locking member 1503.

The main slip body 1501 and the auxiliary slip body 1502 are clamped on both sides of the connecting pipe 5, respectively, and are fixed together by a first locking member. The main slip body 1501 is provided with a rope groove 1504 for allowing the anti-drop safety rope, and a second locking member 1503 blocks the outlet of the rope groove 1504 to limit the anti-drop safety rope in the rope groove 1504.

The slip 15 improves the connection strength of the connecting pipe 5, fixes the drain manifold, and prevents the drain manifold from loosening from the union, jumping and pulsating damage.

Specifically, the main slip body 1501 and the auxiliary slip body 1502 are each semicircular in shape and are secured together by bolts.

In order to reduce the weight of the slips 15, the invention discloses that the main slip body 1501 and the auxiliary slip body 1502 are provided with weight reducing grooves.

In order to further reduce weight, the invention discloses that grooves and/or corrugations are formed on the main slip body 1501 and the auxiliary slip body 1502, so that the main slip body 1501 and the auxiliary slip body can be conveniently taken out or carried by field staff during disassembly and assembly.

Further, the present invention discloses that the slips 15 further comprise a liner 1505, wherein the liner 1505 is fixed to the gripping surfaces of the main slip body 1501 and the auxiliary slip body 1502 for gripping the joint pipe 5, respectively.

In some embodiments, one of the gasket 1505 and the clamping surface is provided with a clamping groove, and the other is provided with a protrusion clamped with the clamping groove, so that the gasket 1505 is connected with the clamping surface.

To enhance the versatility of the gasket 1505, the present invention discloses that the gasket 1505 on the main slip body 1501 and the gasket 1505 on the auxiliary slip body 1502 can be interchanged.

Gasket 1505 is made of polyurethane and is easily replaced after wear. It should be noted that, the lining 1505 is made of polyurethane, which is only one embodiment of the present invention, and in practical application, the lining 1505 may be made of other wear-resistant materials.

Specifically, the present invention discloses that the first locking member is a fastening bolt, and the second locking member 1503 is a locking pin.

In some embodiments, as shown in fig. 5 and 6, the pressure relief six-way valve 6 includes a six-way body 601, a first side interface 604 and a bottom flange 608, a hole 607 is formed in the six-way body 601, and the first side interface 604 and the bottom flange 608 are respectively communicated with two ends of the hole 607 and are respectively used for communicating an outlet of a drain manifold and an inlet of a regulating valve group.

Specifically, the number of the pressure relief six-way 6 is 5, and the 5 pressure relief six-way 6 is different from the bottom flange 608 only to replace the original meter flange of the throttle manifold with different specifications and configured on different sites. The bottom of the 5 pressure relief six-way valve 6 and the flange assembled with the choke manifold 8 are processed according to GB/T22513, and the models are respectively: f52-35, F52-70, F52-105, F65-70, F65-105, the pressure level of the rest parts is 105Mpa, and the technical dimensions are the same.

It should be understood that setting the number of the pressure relief six-way channels 6 to 5 is only one specific embodiment of the present invention, and in practical application, the number of the pressure relief six-way channels 6 may be increased or decreased as required.

Further, the invention discloses that the main body is also provided with a pressure sensor connecting hole 602 communicated with the pore canal 607 for installing a pressure sensor. Specifically, the pressure sensor through hole is an interface which is formed on the top surface of the pressure relief six-way 6 and is completely the same as a conventional meter flange pneumatic pressure sensor, so that the pressure sensor can be quickly disassembled and assembled.

The main body is also provided with a pressure gauge hole 603 communicated with the pore canal 607 for installing a pressure gauge. Specifically, the pressure gauge hole 603 is a pressure gauge interface formed on the top surface of the pressure relief six-way valve 6, so as to realize quick assembly disassembly of the pressure gauge.

Further, the invention discloses a pressure relief six-way valve 6, which further comprises a second side interface 605 and a third side interface 606 which are all arranged on the six-way valve body 601, wherein the second side interface 605 and the third side interface 606 are communicated with a pore canal 607 in the pressure relief six-way valve 6.

The second side interface 605 and the third side interface 606 are respectively detachably connected with blind flange, and are used for sealing the second side interface 605 and the third side interface 606.

Specifically, the first side interface 604 is configured as 1 composite flange formed by combining a female union and a flange, is integrally forged and processed, and is used for connecting the connecting pipe 5, and has high strength, shock resistance and loose resistance in use.

The second side interface 605 is configured as a blind flange with a needle shut-off valve for pre-service pressure testing of the installed drain manifold, dedicated meter flange. The second side port 605 mounts a blind flange with a needle shut-off valve and may also be used to vent the pressure in the pressure relief manifold assembly or to vent the fluid stored in the pressure relief six-way valve 6 when it is inactive or in standby.

The third access port is configured as a blind flange and is used as a plugged line on a daily basis. When the pressure relief construction is stopped in winter, the fluid stored from the drill floor surface to the choke manifold 8 can be rapidly discharged after the blind flange is removed, so that the phenomenon that the fluid in the pipe is frozen and cannot be used is avoided. After the emergency pressure relief pipeline system of the drilling tool water hole is started, the blind flange can be removed to clean the drainage duct 607 when the drilling tool water hole is suspended to be used in the middle or is turned to be in a standby state.

Further, the invention discloses that flanges arranged at the first side interface 604, the second side interface 605 and the third side interface 606 are interchangeable, so that the universality of the pressure relief six-way valve 6 is improved, and in addition, the direction of the drain manifold connected to the throttle manifold 8 can be adjusted according to the field requirement, and the direction of the pressure gauge can be adjusted.

In some embodiments, the regulating valve group comprises a flat valve 7, a throttle manifold 8, a throttle valve 9 and a blow-off line 10, wherein the inlet of the flat valve 7 is communicated with the outlet of the drain manifold, the outlet of the flat valve 7 is communicated with the inlet of the throttle valve 9 through the throttle manifold 8, and the outlet of the throttle valve 9 is communicated with the inlet of the liquid-gas separator 11 through the blow-off line 10.

In particular, the invention discloses at least 2 throttle valves 9 which are mutually emergency standby valves.

When the pressure test of the drilling tool water hole emergency pressure relief pipeline system provided by the invention is used for verifying whether the connection is reliable, the plug valve 1 at the top of the drilling tool assembly is required to be closed, and the flat valve 7 below the pressure relief six-way valve 6 is closed.

In some embodiments, the drilling tool water hole emergency pressure relief pipeline system further comprises a transportation sled 16, and the transportation sled 16 is respectively provided with a fixing bracket 1603 for fixing each component of the system main body, so that the transportation system main body is not easy to collide and damage due to loosening of each component.

Further, the invention discloses that the transporting sled 16 is provided with a protective cover, and the protective cover and the transporting sled 16 form a box body for protecting the system main body.

Further, as shown in fig. 8, the invention discloses that the transporting sled 16 is provided with a rope lifting lug 1601 and/or a forklift supporting hole 1602, so that the transporting, loading and unloading are convenient. When the construction machine is inconvenient to operate on site road muddy, the construction machine can be pulled to a position convenient for hoisting operation.

When the drilling tool water hole emergency pressure relief pipeline system provided by the invention is used, high-pressure gas or gas-liquid mixed fluid which invades the drilling tool water hole is guided to a conventional well control choke manifold 8 arranged on site through a drain manifold and a pressure relief six-way valve 6, so that the gas or gas-liquid mixed fluid is prepared according to the following steps: drilling tool water hole, plug valve 1, drain manifold, pressure release six-way 6, throttle manifold 8, blowout pipeline 10, flow pressure release blowout of liquid-gas separator 11, and separated gas is as follows: the liquid-gas separator 11, the exhaust pipeline 12, the ignition port 13 for discharging and ignition combustion treatment; the solid-liquid mixed fluid for separating gas is recycled after purification treatment according to the purification flow of the liquid-gas separator 11, the slurry discharging pipe 14 line, the vibrating screen, the drilling fluid tank, the sand remover and the deaerator, as shown in figure 2. When the invention is applied to a certain uncertain drilling site, only the six-way valve 6 which is designed and matched with the invention is required to be configured, and other equipment is provided with the installed and debugged qualified conventional well control device by using site configuration. Before the pressure relief of the water hole of the drilling tool is carried out, the original three-way instrument flange of the throttle manifold 8 is replaced by the pressure relief six-way valve 6, the self-drilling platform plane drilling tool joint 2 is clung to the drilling platform and the derrick, the drainage manifold is connected to the pressure relief six-way valve 6 special for new replacement, and the pressure relief six-way valve is reliably fixed by the slips 15 and the ropes.

After the pipeline is installed and fastened, the plug valve 1 at the top of the drilling tool assembly is closed; and closing a flat valve 7 below the special pressure relief six-way valve 6, connecting a pressure test pipeline from a needle-shaped stop valve worn by a flange of a second side interface 605 of the pressure relief six-way valve 6 to the rated pressure of well control devices such as an on-site original throttle manifold 8, and judging that the installation is qualified and performing pressure relief operation according to the pressure test requirement of the well control devices such as drilling engineering design, wherein the pressure stabilizing time and the pressure drop meet the standards.

During pressure relief, the throttle valve 9 is slightly opened to release pressure at low flow, and then the opening of the throttle valve 9 is adjusted to ensure that the discharge flow is lower than the gas treatment capacity of the liquid-gas separator 11, so that the gas at the gas outlet is pure and free of liquid, and can be fully combusted. During pressure relief, before a vibrating screen of a drilling fluid circulation system, fang China, observing the condition that the fluid discharged by the separator contains solid phase, and if necessary, starting the vibrating screen, the mud remover, the sand remover and the deaerator for treatment so as to ensure that the drilling fluid discharged by pressure relief can be recycled.

When the unconventional reverse circulation well killing operation is needed on site, no other parts are needed to be configured, and the invention can be used as a reverse circulation well killing manifold.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to the embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims

1. The drilling tool water hole emergency pressure relief pipeline system is characterized by comprising a system main body, wherein the system main body comprises a drain manifold, an adjusting valve group and a liquid-gas separator;

2. The drilling tool water hole emergency pressure relief pipeline system according to claim 1, wherein the system main body further comprises a drilling fluid treatment system, the drilling fluid treatment system is arranged at a preset treatment station, and an inlet of the drilling fluid treatment device is communicated with a liquid outlet of the liquid-gas separator;

and/or

3. The drilling tool water hole emergency pressure relief pipeline system according to claim 2, wherein the drilling fluid treatment system comprises a vibrating screen, a mud remover, a sand remover and a deaerator, wherein an inlet of the vibrating screen is communicated with a liquid outlet of the liquid-gas separator through the slurry discharging pipe, an outlet of the vibrating screen is communicated with an inlet of the mud remover, an outlet of the mud remover is communicated with an inlet of the sand remover, and an outlet of the sand remover is communicated with an inlet of the deaerator;

and/or

The drain manifold is disposed against the drill floor and the derrick.

4. The drilling tool port emergency pressure relief line system of claim 1, wherein the system body further comprises a pressure relief six-way and plug valve;

5. The drilling tool port emergency pressure relief pipe system of claim 4, wherein the pressure relief six-way valve comprises a six-way body, a first side port and a bottom flange,

6. The drilling tool water hole emergency pressure relief pipeline system according to claim 5, wherein the pressure relief six-way valve further comprises a second side interface and a third side interface which are both arranged on the six-way valve body, and the second side interface and the third side interface are both communicated with the pore canal;

and/or

7. The drilling tool port emergency pressure relief pipe system of claim 4, wherein the system body further comprises a slip;

the slips are fixed on the connecting pipe and the anti-falling safety rope.

8. The drilling tool water hole emergency pressure relief pipe system of claim 7, wherein the slips comprise a main slip body, a secondary slip body, a first locking member, and a second locking member;

9. The drilling tool water hole emergency pressure relief pipeline system according to claim 1, wherein the regulating valve group comprises a flat valve, a choke manifold, a choke valve and a blowout pipeline;

10. The drilling tool port emergency relief line system according to any one of claims 1-9, further comprising a transport sled;